Remote Span - Cisco Catalyst 2960 Software Configuration Manual

Chapter 27 Configuring SPAN and RSPAN
Figure 27-2
Stack port
connections

Remote SPAN

To use RSPAN, the switch must be running the LAN Base image.
Note
RSPAN supports source ports, source VLANs, and destination ports on different switches (or different
switch stacks), enabling remote monitoring of multiple switches across your network.
source ports on Switch A and Switch B. The traffic for each RSPAN session is carried over a
user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. The
RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over
trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. Each
RSPAN source switch must have either ports or VLANs as RSPAN sources. The destination is always a
physical port, as shown on Switch C in the figure.
OL-26520-01
Example of Local SPAN Configuration on a Switch Stack
Catalyst 2975 switch stack
Switch 1
1/0/4
Switch 2
Switch 3
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
Port 4 on switch 1 in the stack Port 4 on switch 1 in the stack Port 4 on switch 1 in the stack
mirrored on port 15 on switch 2 mirrored on port 15 on switch 2 mirrored on port 15 on switch 2
2/0/15
Switch
Understanding SPAN and RSPAN
Figure 27-3 shows
27-3